1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14
10
11 // <unordered_set>
12
13 // class unordered_set
14
15 // node_type extract(const_iterator);
16
17 #include <unordered_set>
18 #include "test_macros.h"
19 #include "min_allocator.h"
20 #include "Counter.h"
21
22 template <class Container>
test(Container & c)23 void test(Container& c)
24 {
25 size_t sz = c.size();
26
27 for (auto first = c.cbegin(); first != c.cend();)
28 {
29 auto key_value = *first;
30 typename Container::node_type t = c.extract(first++);
31 --sz;
32 assert(t.value() == key_value);
33 assert(t.get_allocator() == c.get_allocator());
34 assert(sz == c.size());
35 }
36
37 assert(c.size() == 0);
38 }
39
main(int,char **)40 int main(int, char**)
41 {
42 {
43 using set_type = std::unordered_set<int>;
44 set_type m = {1, 2, 3, 4, 5, 6};
45 test(m);
46 }
47
48 {
49 std::unordered_set<Counter<int>> m = {1, 2, 3, 4, 5, 6};
50 assert(Counter_base::gConstructed == 6);
51 test(m);
52 assert(Counter_base::gConstructed == 0);
53 }
54
55 {
56 using min_alloc_set = std::unordered_set<int, std::hash<int>, std::equal_to<int>, min_allocator<int>>;
57 min_alloc_set m = {1, 2, 3, 4, 5, 6};
58 test(m);
59 }
60
61 return 0;
62 }
63